General Construction Specifications
PART 1 - GENERAL
01 WORK INCLUDED
A. Contractor shall provide and install the following as specified herein and in locations shown on drawings.
1. Access doors.
2. Outside air louvers.
3. Backdraft dampers.
4. Air turning devices.
02 QUALITY CONTROL
A. Air diffusers, grilles, and registers to have ratings certified by Air Diffusion Council and tested per ADC Equipment Test Code 1062R2 and ASHRAE Standard 36B-63.
03 SUBMITTALS
A. Submit product data to Owner for approval as required by Section 15010.
PART 2 - PRODUCTS
02 EQUIPMENT REQUIREMENTS FOR REGISTERS, GRILLES AND DIFFUSERS
A. Acceptable manufacturers include: Titus, E. H. Price, and Anemostat. (Anemostat model numbers are used).
B. Sidewall Supply Registers: Anemostat Rotacore No. 2250, extruded aluminum, removable core, complete with removable face key operated opposed blade volume control, screws not visible from room. Provide baked-on, off-white enamel finish.
C. Sidewall Return and Exhaust Registers: Anemostat XRC35HC extruded aluminum, removable core and opposed blade removable face key operated volume controls with baked-on, off-white enamel finish.
D. Ceiling Diffusers: Square recessed diffusers. Anemostat Type E-1 complete with volume dampers and baked-on off-white enamel finish. Frame to be flush mounted.
1. Ceiling diffusers may be suitable for lay-in tile installation by mounting it in a factory fabricated, 24" x 24" panel, only if diffuser face is a minimum of 18" x 18".
2. Do not use directional diffusers. Diffusers noted on drawings as three-way or two-way blow shall be four-way diffusers with sides blanked off with sheet metal plates installed in the diffuser.
3. No screws shall be used in patient room diffusers.
B. Exhaust and Return Registers: Anemostat Type GC50 1/2" egg-crate aluminum with dampers with baked-on, off-white enamel finish.
C. Door Grilles: Anemostat NS, prime-coated steel, deliver to the Millwork Fabricator for installation as directed by the Contractor.
2.02 EQUIPMENT REQUIREMENTS FOR ACCESS DOORS
A. Venco CAD-10, insulated doors, or approved equal located in ductwork, floors, walls, ceilings, or casing for service such as automatic dampers, fire dampers, smoke dampers, humidifiers, entering side of duct coils (entering side only), casing mounted coils (each side), filters (each side), and elsewhere as noted on drawings.
B. The size of all access doors at all fire, smoke, or combination dampers shall be as follows:
DUCT SIZE ACCESS DOOR
12" to 20" 12" x 12"
20" to 36" 18" x 18"
36" and above 24" x 24"
Under 12" Of sufficient size to service equipment or replace fusible line.
E. Apparatus Casing Access Doors: Prehung door frame assemblies, VEnco HF-10, or equal.
F. Provide reinforced wire glass view windows 12" x 12" in access doors at humidifiers.
G. Use double panel construction, two sheets of at least 24 gauge galvanized steel with 1" thick insulation between panels.
H. Mount doors in a rigid frame of at least 22 gauge formed galvanized steel or aluminum.
I. Use angle iron bracing as required to make the door frame a rigid assembly.
J. Hinge access doors and provide positive closing, tight sealing and easily operated latches.
K. Provide latches that permit easy removal of access door while maintaining positive closing and minimum leakage.
L. Provide sponge rubber gaskets for all doors.
03 EQUIPMENT REQUIREMENTS FOR AIR DISTRIBUTION LOUVERS
A. Verify size, location, and placement of louvers prior to fabrication; coordinate field measurements and shop drawings and shop assembly to minimize field adjustments, splicing, mechanical joints and field assembly of units.
B. Preassemble louvers in as large sections as practical.
C. Exterior Louvers and Screens: Ruskin Model ELF-375, or approved equal by Airolite, United Air, or Louvers and Dampers, Inc.
D. Material: Extruded aluminum with 12 gauge, .081" thick aluminum blades and frame and welded construction.
E. Blade Angle: At least 37.5 degrees.
F. Use blades at least 4" deep.
G. Set blades on 3" centers.
H. Provide internally braced, mitered corners with caulking slots.
I. Provide slidable interlocked mullions with a provision for expansion and contraction and stainless steel or aluminum fasteners.
J. Design structural supports to carry a wind load of not less than 20 pounds per square foot.
K. Provide bird screen, 1/4" square mesh of 16 gauge, .051", expanded flattened aluminum. Screens shall be on the interior side of louver and shall be removable.
L. Provide formed metal sills of the same gauge and material as the louver, sized to lap under the louver sill and the outside edge of the wall.
M. Louver Finish:
1. Duranodic Finish: Provide Owner with color samples.
2. Mill finish for painting.
3. Clear anodized finish.
B. Provide louvers with AMCA Certified Ratings Seal for Air Performance and Water Penetration.
C. Size louvers as shown on the drawings.
D. Select intake louvers at or below the "Point of Zero Water Penetration".
E. Do not exceed 0.2" of water pressure drop across louvers.
F. Acceptable manufacturers for louvered penthouses are: Ruskin, Airolite, Greenheck, Louvers and Dampers, Inc.
G. Have finish on louvered penthouses approved by the Owner's Construction Manager.
2.02 BACKDRAFT DAMPERS
A. Provide multi-blade, parallel action gravity balanced backdraft dampers of 16 gauge galvanized steel, or extruded aluminum, with center pivoted blades of maximum 6 inch width, with felt or flexible vinyl sealed edges, linked together in rattle-free manner with 90 degree stop, steel ball bearings, and plated steel pivot pin; adjustment device to permit setting for varying differential static pressure.
PART 3 - EXECUTION
04 INSTALLATION
A. Sheet metal accessories to be installed in locations shown on drawings.
B. Installation to be in accordance with manufacturer's published recommendations as well as applicable sections of SMACNA manual and other standards set forth in Part 1.03 above.
C. Provide all screws, bolts, nuts, inserts, and material required for attaching sheet metal to duct, walls, floors, and ceilings.
D. Provide balancing dampers at points on low pressure supply, return, and exhaust systems where branches are taken from larger ducts as required for air balancing. Use splitter dampers only where indicated.
E. Provide balancing dampers on medium and high pressure systems where indicated.
F. Provide fire dampers, and/or smoke dampers at locations indicated, where ducts and outlets pass through fire rated components, and where required by authorities having jurisdiction. Install with required perimeter mounting angles, sleeves, breakaway duct connections, corrosion resistant springs, bearings, bushings and hinges.
G. Demonstrate re-setting of fire dampers to authorities having jurisdiction and Owner's Representative.
H. Provide backdraft dampers on exhaust fans or exhaust ducts nearest to outside and where indicated.
I. Provide flexible connections immediately adjacent to in ducts associated with fans and motorized equipment. Cover connections to medium and high pressure fans with leaded vinyl sheet, held in place with metal straps.
J. Provide duct access doors for inspection and cleaning before and after filters, coils, fans, automatic dampers, at fire dampers, and elsewhere as indicated.
05 TESTING
A. Check work for satisfactory installation and performance.
B. Insure that adequate access does in fact exist for fire and smoke dampers and that damper operator motors are not hindered in operation by proximity to walls or other objects.
C. Where applicable, check duct connections, access doors, etc. for leakage and condensation and correct conditions found.
END OF SECTION
